Boost charging method, device, equipment and vehicle

Abstract

The invention discloses a boost charging method, device and equipment and a vehicle, and relates to the technical field of vehicles. The boost charging method comprises the steps that when the vehicle is in a boost charging state, the charging torque of a driving motor in the vehicle is determined; according to the charging torque, the permissible charging current of the vehicle is determined, and the permissible charging current is the permissible maximum charging current; the vehicle is charged using a charging current that is not greater than the permissible charging current. When the vehicle is subjected to boost charging, the charging speed of the vehicle can be ensured, and impact and shaking generated by boost charging can be reduced, so that the driving experience is improved.

Description

A boost charging method, device, equipment and vehicle Technical Field

[0001] The present application relates to the field of vehicle technology, and in particular to a boost charging method, device, equipment and vehicle. Background Art

[0002] With the rapid development of electric vehicle-related technologies, fast charging technology for electric vehicle power batteries has become increasingly important. DC charging is a commonly used charging method for electric vehicles. The charging voltage under this method is relatively high, usually 500 to 800V, and the charging time is about 0.5 to 1 hour. Increasing the battery voltage is an important means to increase the DC charging speed and shorten the charging time of electric vehicles. For electric vehicles equipped with high-voltage power batteries, the voltage of the power battery is usually higher than 700V. The voltages of DC charging piles currently on the market can basically include 500V, 750V and 1000V. However, battery packs on high-voltage platforms cannot be charged or fully charged on charging piles on low-voltage platforms. For example, a 500V DC charging pile cannot perform DC fast charging on power batteries above 700V.

[0003] To address the DC fast charging needs of electric vehicles, high-voltage power batteries can be equipped with a DC boost circuit. However, independent DC boost circuits are costly, bulky, and heavy. Currently, the industry's commonly used solution is to use power devices in the motor drive system to boost the voltage before charging the battery. However, this solution also generates current in the motor windings during charging, generating a certain amount of torque. This can cause noticeable shock or vibration in the vehicle at the end of charging, affecting the driving experience.

[0004] Summary of the Invention

[0005] The present application provides a boost charging method, device, equipment and vehicle for reducing the problem of vehicle vibration caused by boost charging and improving the driving experience.

[0006] In a first aspect, a boost charging method is provided, comprising: determining, when a vehicle is in a boost charging state, a charging torque of a drive motor in the vehicle, wherein the vehicle may include one or more drive motors; determining, based on the charging torque, an allowable charging current for the vehicle, wherein the allowable charging current is a maximum allowable charging current; and charging the vehicle using a charging current no greater than the allowable charging current, i.e., charging the vehicle using a charging current less than or equal to the allowable charging current. Optionally, the drive motor supports two-phase boost charging.

[0007] In the above technical solution, when a vehicle is in a boost charging state, the charging torque of the vehicle's drive motor is determined. Based on this charging torque, the vehicle's permitted charging current is determined. This permitted charging current is the maximum allowable charging current. Finally, the vehicle is charged using a charging current no greater than this permitted charging current. This ensures that the vehicle's charging speed is maintained while reducing the shock and vibration caused by boost charging, thereby improving the driving experience.

[0008] In one possible implementation of the first aspect, the maximum allowable charging current includes a maximum allowable charging current when the vehicle is in a safe state. In this possible implementation, the charging speed of the vehicle can be increased as much as possible while ensuring the safety of the vehicle, thereby reducing the impact and vibration caused by boost charging.

[0009] In one possible implementation of the first aspect, the maximum allowable charging current includes the maximum allowable charging current when the vehicle's noise, vibration, and harshness (NVH) rating is less than a preset threshold. In this possible implementation, the vehicle's charging speed can be increased as much as possible while ensuring the vehicle's NVH rating is within an acceptable range, thereby reducing the shock and vibration caused by boost charging.

[0010] In one possible implementation of the first aspect, determining the permissible charging current for the vehicle based on the charging torque includes determining the permissible charging current for the vehicle based on the charging torque and the vehicle's parking brake torque when the vehicle is on a slope less than or equal to a preset slope. In this possible implementation, when the vehicle is on a slope, the accuracy of the determined permissible charging current can be further improved, thereby ensuring the vehicle's charging speed and reducing the shock and vibration caused by boost charging.

[0011] In one possible implementation of the first aspect, determining the permissible charging current of the vehicle based on the charging torque and the parking brake torque of the vehicle includes: determining, based on the charging torque and the parking brake torque, the permissible charging current corresponding to the charging torque and the parking brake torque from preset corresponding information; wherein the preset corresponding information indicates the permissible charging current corresponding to different charging torques and different parking brake torques. In this possible implementation, determining the permissible charging current corresponding to the charging torque and the parking brake torque based on the preset corresponding information can improve the speed and accuracy of determining the permissible charging current.

[0012] In one possible implementation of the first aspect, the method further includes determining a parking brake torque for the vehicle based on the slope of the vehicle and the charging torque. In this possible implementation, determining the parking brake torque for the vehicle based on the slope of the vehicle and the charging torque can improve the speed and accuracy of determining the parking brake torque.

[0013] In one possible implementation of the first aspect, determining the parking brake torque of the vehicle based on the slope of the vehicle and the charging torque includes: determining a slope component torque based on the weight of the vehicle and the slope of the vehicle; and determining the parking brake torque of the vehicle based on the slope component torque and the charging torque. This possible implementation provides a simple and effective method for determining the parking brake torque of the vehicle.

[0014] In one possible implementation of the first aspect, determining the charging torque of the drive motor in the vehicle includes determining the charging torque of the drive motor based on a phase of the drive motor. In this possible implementation, the charging torque of the drive motor can be quickly and efficiently determined based on the phase of the drive motor.

[0015] In one possible implementation of the first aspect, charging the vehicle with a charging current no greater than the permitted charging current includes charging the vehicle with a gradually increasing charging current no greater than the permitted charging current, the charging current increasing at a rate less than a preset rate. In this possible implementation, by maintaining the charging current increasing at a rate less than the preset rate, vehicle jitter caused by the rapid increase in the charging current can be reduced.

[0016] In a second aspect, a boost charging device is provided, comprising: a first processing unit for determining the charging torque of a drive motor in the vehicle when the vehicle is in a boost charging state; a second processing unit for determining an allowable charging current for the vehicle based on the charging torque, the allowable charging current being the maximum allowable charging current; and an output unit for charging the vehicle using a charging current no greater than the allowable charging current. Optionally, the drive motor supports two-phase boost charging.

[0017] In a possible implementation manner of the second aspect, the maximum allowable charging current includes: a maximum charging current allowed when the vehicle is in a safe state.

[0018] In a possible implementation of the second aspect, the maximum allowable charging current includes: a maximum allowable charging current when noise vibration harshness (NVH) of the vehicle is less than a preset threshold.

[0019] In a possible implementation of the second aspect, the second processing unit is further used to: when the slope of the vehicle is less than or equal to a preset slope, determine the permitted charging current of the vehicle based on the charging torque and the parking brake torque of the vehicle.

[0020] In a possible implementation of the second aspect, the second processing unit is further used to: determine, based on the charging torque and the parking brake torque, an allowable charging current corresponding to the charging torque and the parking brake torque from preset corresponding information; wherein the preset corresponding information is used to indicate the allowable charging current corresponding to different charging torques and different parking brake torques.

[0021] In a possible implementation of the second aspect, the second processing unit is further configured to determine a parking brake torque of the vehicle according to a slope of the vehicle and the charging torque.

[0022] In a possible implementation of the second aspect, the second processing unit is further used to: determine the slope component torque based on the weight of the vehicle and the slope of the vehicle; and determine the parking brake torque of the vehicle based on the slope component torque and the charging torque.

[0023] In a possible implementation manner of the second aspect, the first processing unit is further configured to: determine a charging torque of the drive motor according to a phase of the drive motor.

[0024] In a possible implementation of the second aspect, the output unit is further configured to charge the vehicle using a charging current that gradually increases and is no greater than the permitted charging current, wherein a growth rate of the charging current is less than a preset rate.

[0025] In a third aspect, a terminal device is provided, comprising a processor and a memory, wherein the memory stores instructions, and the processor executes the instructions, causing the terminal device to perform the boost charging method provided in the first aspect or any possible implementation of the first aspect. Optionally, the terminal device is a vehicle-mounted terminal.

[0026] In another aspect of the present application, a vehicle is provided, which includes the boost charging device provided by the second aspect or any possible implementation of the second aspect, or the terminal device provided by the third aspect.

[0027] In another aspect of the present application, a computer-readable storage medium is provided, in which instructions are stored. When the instructions are executed by a device, the device performs the boost charging method provided in the first aspect or any possible implementation of the first aspect.

[0028] In another aspect of the present application, a computer program product is provided, which includes: a computer program (also referred to as code, or instructions), which, when executed, enables a computer to execute the boost charging method provided in the first aspect or any possible implementation of the first aspect.

[0029] It can be understood that the beneficial effects that can be achieved by any of the boost charging devices, terminal equipment, vehicles, computer-readable storage media and computer program products provided above can correspond to the beneficial effects of the boost charging method provided above. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] FIG1 is a schematic diagram of charging a power battery according to an embodiment of the present application;

[0031] FIG2 is a schematic diagram of the structure of a terminal device provided in an embodiment of the present application;

[0032] FIG3 is a schematic diagram of a flow chart of a boost charging method provided in an embodiment of the present application;

[0033] FIG4 is a schematic diagram of charging torque corresponding to different rotation angle positions provided by an embodiment of the present application;

[0034] FIG5 is a schematic diagram of a wheel end torque change provided by an embodiment of the present application;

[0035] FIG6 is a schematic diagram of a vehicle on a sloped ground provided by an embodiment of the present application;

[0036] FIG7 is a schematic flow chart of another boost charging method provided in an embodiment of the present application;

[0037] FIG8 is a schematic diagram of a relationship between different torques provided in an embodiment of the present application;

[0038] FIG9 is a schematic flow chart of another boost charging method provided in an embodiment of the present application;

[0039] FIG10 is a schematic structural diagram of a boost charging device provided in an embodiment of the present application;

[0040] FIG11 is a schematic structural diagram of another boost charging device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0041] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application. In the present application, "at least one" refers to one or more, and "plurality" refers to two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: the existence of A alone, the existence of A and B at the same time, and the existence of B alone, where A and B can be singular or plural. The character " / " generally indicates that the associated objects before and after are in an "or" relationship. "At least one of the following" or similar expressions refers to any combination of these items, including any combination of single or plural items. For example, at least one of a, b or c can represent: a, b, c, a and b, a and c, b and c or a, b and c, where a, b and c can be single or multiple. In addition, in the embodiments of the present application, words such as "first" and "second" do not limit the quantity and order.

[0042] It should be noted that, in this application, words such as "exemplary" or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described in this application as "exemplary" or "for example" should not be construed as being preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "for example" is intended to present the relevant concepts in a concrete manner.

[0043] With the rapid development of electric vehicle-related technologies, fast-charging technology for electric vehicle power batteries has become increasingly important. Electric vehicles can be charged using two methods: direct current (DC) and alternating current (AC). AC charging is characterized by a 220V charging voltage and a relatively slow charging speed, typically requiring 6-8 hours to fully charge. DC charging, on the other hand, features a higher charging voltage, typically 500 to 800V, and a charging time of 0.5-1 hour. Therefore, increasing battery voltage is a key means of increasing DC charging speed and shortening EV charging times.

[0044] Among them, for electric vehicles equipped with high-voltage power batteries, the voltage of the power battery is generally higher than 700V. The voltages of DC charging piles currently available on the market basically include 500V, 750V, and 1000V. However, battery packs on high-voltage platforms cannot be charged or fully charged on charging piles on low-voltage platforms. For example, a 500V DC charging pile cannot perform DC fast charging on power batteries above 700V. To meet the DC fast charging needs of electric vehicles, electric vehicles with high-voltage power batteries can be equipped with a DC boost circuit. However, equipping an independent DC boost circuit has the problems of high cost, large size, and heavy weight.

[0045] At present, the commonly used solution in the industry is to use the power devices in the control system and motor drive system in the vehicle to boost the voltage and charge the power battery. This can also be called "reusing the vehicle's powertrain" to boost and charge the power battery. However, this solution will generate current in the motor windings during the charging process, which will cause the vehicle's wheels to generate a certain torque. At the end of charging, the torque will be suddenly released (because the current suddenly decreases to 0), causing the vehicle to produce a noticeable shock or shake, thereby affecting the driving experience. Among them, for the two-phase boost charging solution, the shock or shake problem is particularly serious.

[0046] FIG1 is a schematic diagram of a powertrain of a reused vehicle provided in an embodiment of the present application for charging a power battery. The powertrain may be an electric drive assembly. The vehicle may include: a charging port, an electric drive assembly, a battery pack, a transmission system, a hydraulic brake system, an electronic parking brake (EPB) system, wheels, and a controller, etc. The controller may be a vehicle control unit (VCU) for controlling a central control screen. For example, it is assumed that the vehicle includes wheels 1 to 4, electric drive assemblies 10 and 20, transmission systems 11 to 41, hydraulic brake systems 12 to 42, EPB 33 and EPB 43. Specifically, electric drive assembly 10 is connected to wheels 1 and 2 via transmission systems 11 and 21, respectively. Wheels 1 and 2 are also connected to hydraulic brake systems 12 and 22, respectively. Electric drive assembly 20 is connected to wheels 3 and 4 via transmission systems 31 and 41, respectively. Wheel 3 is also connected to hydraulic brake system 32 and EPB 33, respectively, while wheel 4 is also connected to hydraulic brake system 42 and EPB 43, respectively. The VCU can be used to control the central control screen, charging port, electric drive assembly 10, and electric drive assembly 20. Furthermore, the vehicle may also include a boost charging device located between the charging port and electric drive assembly 20, and the VCU can also be used to control the boost charging device.

[0047] In one possible embodiment, taking the example of boost charging a battery pack by reusing the electric drive assembly 20, when a user needs to boost charge a vehicle, they first configure the vehicle's charging function on the central control panel (or other control device) to open the charging port and allow the user to plug in the charger, i.e., connect the charging port to the charging pile. After the charger is plugged in, under the control of a controller such as the VCU, the electric drive assembly 20 and the boost charging device operate in boost charging mode, with current flowing through the path from the charging pile to the charging port to the boost charging device to the electric drive assembly 20 and finally to the battery pack to boost charge the battery pack.

[0048] In the above-mentioned process of boost charging using the electric drive assembly, the small stall torque generated by the drive motor in the electric drive assembly will be converted into a large torque through the transmission system and transmitted to the wheels. In this way, when charging is completed, the torque will be suddenly released, which will cause the vehicle to shake. Among them, the torque can be determined by the rotation angle of the drive motor and changes periodically. If the rotor of the drive motor is in a stable position with a stall torque of 0 during boost charging, the shaking phenomenon can be eliminated. In addition, reducing the charging current can also reduce vehicle shaking, but reducing the charging current too low will cause the charging speed to drop sharply, so how to reasonably control the charging current is a problem that needs to be solved.

[0049] Based on this, an embodiment of the present application provides a boost charging method, which can be applied to vehicles, on-board terminals, or other terminals for controlling vehicles. The method includes: when the vehicle is in a boost charging state, determining the charging torque of the drive motor in the vehicle, and determining the permitted charging current of the vehicle based on the charging torque, the permitted charging current being the maximum allowed charging current, and finally using a charging current not greater than the permitted charging current to charge the vehicle. In this way, when boost charging the vehicle, the impact and vibration caused by boost charging can be reduced while ensuring the charging speed of the vehicle, thereby improving the driving experience.

[0050] FIG2 is a schematic diagram of the structure of a terminal device provided in an embodiment of the present application. The terminal device can be a vehicle, a vehicle-mounted terminal, or other terminal for controlling a vehicle, etc. The vehicle can include an electric vehicle and a hybrid vehicle. Optionally, the vehicle can include a road vehicle, a water vehicle, an air vehicle, an industrial device, an agricultural device, or an entertainment device, etc. The vehicle is a vehicle in a broad sense. For example, the vehicle can be a vehicle (such as a commercial vehicle, a passenger car, a motorcycle, a flying car, a train, etc.), an industrial vehicle (such as a forklift, a trailer, a tractor, etc.), an engineering vehicle (such as an excavator, a bulldozer, a crane, etc.), agricultural equipment (such as a mower, a harvester, etc.), amusement equipment, a toy vehicle, etc. The embodiment of the present application does not specifically limit the type of vehicle. For example, the vehicle can also be a vehicle such as an airplane or a ship.

[0051] As shown in Figure 2, the terminal device may include a processor 210, an external memory interface 220, an internal memory 221, a universal serial bus (USB) interface 230, a wireless communication module 260, an audio module 270, a sensor module 280, a button 290, a motor 291, an indicator 292, a camera 293 and an on-board display device 294, etc.

[0052] It is understood that the structures illustrated in the embodiments of the present application do not constitute specific limitations on the terminal device. In other embodiments of the present application, the terminal device may include more or fewer components than shown, or may combine or separate certain components, or arrange the components differently. The illustrated components may be implemented in hardware, software, or a combination of software and hardware.

[0053] The processor 210 includes one or more processing units, for example, an application processor (AP), a modem processor, a graphics processing unit (GPU), an image signal processor (ISP), a controller, a video codec, a digital signal processor (DSP), a baseband processor, and / or a neural-network processing unit (NPU). The different processing units may be independent devices or integrated into one or more processors.

[0054] The controller can generate an operation control signal based on the instruction opcode and timing signal to complete the control of instruction fetching and execution. Optionally, the controller is a vehicle controller or a drive system controller. In one possible example, the controller is a VCU, a battery management system (BMS) controller, or a microcontroller unit (MCU) in a powertrain.

[0055] Processor 210 may also include a memory for storing instructions and data. In some embodiments, the memory in processor 210 is a cache memory. This memory can store instructions or data that have just been used or are being recycled by processor 210. If processor 210 needs to use the same instruction or data again, it can directly access the memory. This avoids duplicate accesses, reduces processor 210 latency, and thus improves system efficiency.

[0056] In some embodiments, the processor 210 may include one or more interfaces. The interfaces may include an inter-integrated circuit (I2C) interface, an inter-integrated circuit sound (I2S) interface, a pulse code modulation (PCM) interface, a universal asynchronous receiver / transmitter (UART) interface, a mobile industry processor interface (MIPI), a general-purpose input / output (GPIO) interface, a subscriber identity module (SIM) interface, and / or a universal serial bus (USB) interface.

[0057] The MIPI interface can be used to connect the processor 210 to peripheral devices such as the vehicle-mounted display device 294 and the camera 293. MIPI interfaces include the camera serial interface (CSI) and the display serial interface (DSI). In some embodiments, the processor 210 and the camera 293 communicate via the CSI interface to implement the terminal device's camera function. The processor 210 and the vehicle-mounted display device 294 communicate via the DSI interface to implement the terminal device's display function.

[0058] The USB interface 230 is an interface that complies with USB standards and specifications, and may be a Mini USB interface, a Micro USB interface, a USB Type-C interface, or the like. The USB interface 230 can be used to connect a charger to charge the terminal device, or to transfer data between the terminal device and peripheral devices. It can also be used to connect headphones to play audio. This interface can also be used to connect other terminal devices, such as augmented reality (AR) devices.

[0059] It is understood that the interface connection relationship between the modules illustrated in the embodiments of the present application is only a schematic illustration and does not constitute a structural limitation on the terminal device. In other embodiments of the present application, the terminal device may also adopt a different interface connection method from the above embodiments, or a combination of multiple interface connection methods.

[0060] The wireless communication function of the terminal device can be implemented through an antenna, a wireless communication module 260, a modem processor, and a baseband processor.

[0061] Antennas are used to transmit and receive electromagnetic wave signals. Each antenna in a terminal device can be used to cover a single or multiple communication frequency bands. Different antennas can also be reused to improve antenna utilization. For example, antennas can be reused as diversity antennas for wireless local area networks. In some other embodiments, antennas can be used in conjunction with tuning switches.

[0062] The wireless communication module 260 can provide wireless communication solutions including wireless local area networks (WLAN) (such as wireless fidelity (WiFi) networks), Bluetooth (BT), global navigation satellite system (GNSS), frequency modulation (FM), near field communication (NFC), infrared (IR), etc., which are applied to terminal devices. The wireless communication module 260 can be one or more devices that integrate at least one communication processing module. The wireless communication module 260 receives electromagnetic waves via an antenna, frequency modulates and filters the electromagnetic wave signals, and sends the processed signals to the processor 210. The wireless communication module 260 can also receive the signal to be sent from the processor 210, frequency modulate it, amplify it, and convert it into electromagnetic waves for radiation through the antenna.

[0063] In some embodiments, the terminal device can communicate with the network and other devices through wireless communication technology. The wireless communication technology may include global system for mobile communications (GSM), general packet radio service (GPRS), code division multiple access (CDMA), wideband code division multiple access (WCDMA), time-division code division multiple access (TD-SCDMA), long term evolution (LTE), BT, GNSS, WLAN, NFC, FM, and / or IR technology. The GNSS may include global positioning system (GPS), global navigation satellite system (GLONASS), Beidou navigation satellite system (BDS), quasi-zenith satellite system (QZSS) and / or satellite based augmentation system (SBAS).

[0064] The terminal device implements display functions through a GPU, an onboard display device 294, and an application processor. The GPU is a microprocessor for image processing that connects the onboard display device 294 and the application processor. The GPU is used to perform mathematical and geometric calculations for graphics rendering. The processor 210 may include one or more GPUs, which execute program instructions to generate or modify display information.

[0065] The vehicle-mounted display device 294 is used to display images, videos, etc. The vehicle-mounted display device 294 may include a display panel. The display panel may be manufactured using a liquid crystal display (LCD), for example, an organic light-emitting diode (OLED), an active-matrix organic light-emitting diode or an active-matrix organic light-emitting diode (AMOLED), a flexible light-emitting diode (FLED), a mini light-emitting diode (Mini-LED), a micro-LED, a micro-OLED, a quantum dot light-emitting diode (QLED), etc. Optionally, the terminal device may include one or more vehicle-mounted display devices 294.

[0066] In some embodiments, the in-vehicle display device 294 includes an interactive display screen, which can be a physical display screen and is an important component of the in-vehicle infotainment system. For example, multiple display screens are provided in the vehicle cabin, such as a digital instrument display screen, a central control screen, a display screen in front of the passenger seat, a display screen in front of the left rear seat, a display screen in front of the right rear seat, and armrest screens (e.g., displays on the armrests of the two rear seats). Even the windows can serve as display screens.

[0067] The camera 293 is used to capture still images or videos. The object generates an optical image through the lens and projects it onto the photosensitive element. The photosensitive element can be a charge coupled device (CCD) or a complementary metal-oxide-semiconductor (CMOS) phototransistor. The photosensitive element converts the light signal into an electrical signal, and then transmits the electrical signal to the ISP to be converted into a digital image signal. The ISP outputs the digital image signal to the DSP for processing. The DSP converts the digital image signal into an image signal in standard red, green, blue (RGB), luminance chrominance (YUV) and other formats. Optionally, the terminal device may include one or more cameras 293.

[0068] The external memory interface 220 can be used to connect an external memory card, such as a Micro SD card, to expand the storage capacity of the terminal device. The external memory card communicates with the processor 210 via the external memory interface 220 to implement data storage functions. For example, files such as music and videos can be stored on the external memory card.

[0069] The internal memory 221 can be used to store computer executable program code, which includes instructions. The internal memory 221 may include a program storage area and a data storage area. Among them, the program storage area can store an operating system, an application required for at least one function (such as a sound playback function, an image playback function, etc.), etc. The data storage area can store data created during the use of the terminal device (such as audio data, a phone book, etc.), etc. In addition, the internal memory 221 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one disk storage device, a flash memory device, a universal flash storage (UFS), etc. The processor 210 executes various functional applications and data processing of the terminal device by running instructions stored in the internal memory 221 and / or instructions stored in a memory provided in the processor 210.

[0070] The audio module 270 is used to convert digital audio information into analog audio signal output, and is also used to convert analog audio input into digital audio signals. The audio module 270 can also be used to encode and decode audio signals. In some embodiments, the audio module 270 can be provided in the processor 210, or some functional modules of the audio module 270 can be provided in the processor 210. The terminal device can use the audio module 270 for functions such as music playback and recording. The audio module 270 may include a speaker, a receiver, a microphone, a headphone jack, and an application processor to implement audio functions.

[0071] The sensor module 280 may include a pressure sensor, a gyro sensor, an air pressure sensor, a magnetic sensor, an acceleration sensor, a distance sensor, a proximity light sensor, a fingerprint sensor, a temperature sensor, a touch sensor, an ambient light sensor, a bone conduction sensor, and the like.

[0072] A touch sensor, also known as a "touch control device," can be provided on the display screen of the vehicle-mounted display device 294. The touch sensor and the display screen form a touch screen, also known as a "touch screen." The touch sensor is used to detect touch operations applied to or near the touch sensor. The touch sensor can transmit the detected touch operation to the application processor to determine the type of touch event. Visual output related to the touch operation can be provided through the display screen. In other embodiments, the touch sensor can also be provided on the surface of the terminal device, in a location different from that of the display screen.

[0073] Keys 290 include a control key, a power key, a volume key, and the like. Keys 290 may be mechanical keys or touch keys. The terminal device may receive key inputs and generate key signal inputs related to user settings and function control of the terminal device.

[0074] Motor 291 can be used for touch vibration feedback. For example, touch operations applied to different applications can correspond to different vibration feedback effects. Motor 291 can also correspond to different vibration feedback effects for touch operations applied to different areas of the display screen of the vehicle-mounted display device 294. The touch vibration feedback effects can also be customized.

[0075] The indicator 292 may be an indicator light, may be used to indicate a change in power level, may also be used to indicate a message, a turn signal, a seat belt reminder light, etc.

[0076] Figure 3 is a flow chart of a boost charging method provided in an embodiment of the present application. The method can be applied to a terminal device, which can be the terminal device provided above. The method can include the following steps.

[0077] S301: When the vehicle is in a boost charging state, determine the charging torque of the driving motor in the vehicle.

[0078] The vehicle may include a single drive motor, two drive motors, or multiple drive motors. When the vehicle includes at least two drive motors, any one of the at least two drive motors may be reused for boost charging of the vehicle. Therefore, the charging torque of the reused drive motor needs to be determined. Optionally, the drive motor may support two-phase boost charging.

[0079] In addition, the charging torque of the drive motor can also be simply referred to as motor torque. In actual applications, the charging torque of the drive motor can be transmitted to the wheels through the transmission system. The torque transmitted to the wheels can be called wheel-end torque. Therefore, the charging torque of the drive circuit can also be replaced by wheel-end torque.

[0080] In one possible embodiment, determining the charging torque of the drive motor in the vehicle may specifically include determining the charging torque of the drive motor based on a phase of the drive motor. The phase of the drive motor may specifically refer to an angular position of the drive motor (i.e., a position angle of a rotor in the drive motor), and the angular position may be any angle between [0° and 360°].

[0081] For example, FIG4 shows a schematic diagram of the charging torque corresponding to different rotation angle positions. Specifically, when the rotation angle position is 0°, the charging torque is -100 Nm; when the rotation angle position is 60°, the charging torque is 0 Nm; when the rotation angle position is between 0° and 120°, the charging torque gradually increases; when the rotation angle position is 120°, the charging torque is 100 Nm; when the rotation angle position is between 120° and 360°, the charging torque gradually decreases; when the rotation angle position is 240°, the charging torque is 0 Nm. FIG4 is illustrated by taking the case where the charging current is fixed as an example.

[0082] As can be seen from the above figure, when the angular position is between 60° and 240°, the value of the charging torque is positive, where 60° and 240° are the two equilibrium points of the rotor of the drive motor. These two points are equilibrium points. Therefore, when the angular position is between 60° and 240°, it can be considered that the rotor of the drive motor will rotate in the positive direction; when the angular position is between 0° and 60°, and between 240° and 360°, it can be considered that the rotor of the drive motor will rotate in the opposite direction. When the corresponding angular position after the rotor of the drive motor rotates is approximately between 170° and 340°, the rotor of the drive motor can be considered to be in a balanced state, and the charging torque is approximately between -50Nm and 50Nm.

[0083] It should be understood that the charging torques corresponding to the different rotational angle positions shown in FIG4 are merely exemplary and do not limit the embodiments of the present application. Furthermore, when the rotational angle position is approximately between 170° and 340°, the rotor of the drive motor is generally in a balanced state. When the rotational angle position of the drive motor is outside the range of 170° to 340°, the rotor of the drive motor is in an unbalanced state, causing the rotor to rotate to a certain extent until it reaches a balanced state.

[0084] In practical applications, the charging torque of the drive motor is related to the current of the drive motor and the angular position of the drive motor. Accordingly, the above-mentioned determination of the charging torque of the drive motor can also be replaced by: determining the current of the drive motor; and / or determining the angular position of the drive motor. Thereafter, the charging torque of the drive motor is determined based on the current and / or angular position of the drive motor; alternatively, the step of determining the allowable charging current described below can be performed directly based on the current and / or angular position of the drive motor.

[0085] Exemplarily, (a) in FIG5 shows a schematic diagram of wheel-end torque corresponding to different angular positions. Specifically, when the angular position is between 0° and 55°, and between 225° and 360°, the wheel-end torque is negative, and reaches a maximum when the angular position is 45°; when the angular position is between 55° and 225°, the wheel-end torque is positive, and reaches a maximum when the angular position is 65°. Exemplarily, (b) in FIG5 shows a schematic diagram of wheel-end torque corresponding to different charging current ratios. Specifically, at the same angular position, the charging current is positively correlated with the wheel-end torque, and the charging current first increases and then decreases as the wheel-end torque changes.

[0086] It can be understood that the wheel-end torques corresponding to different angular positions shown in (a) of FIG5 are merely exemplary, and the wheel-end torques corresponding to different charging current ratios shown in (b) of FIG5 are merely exemplary and do not constitute a limitation to the embodiments of the present application.

[0087] In a possible embodiment, determining the charging torque of the drive motor in the vehicle may specifically include: obtaining the current of the drive motor and the angular position of the drive motor, and determining the charging torque of the drive motor based on the current and the angular position.

[0088] In another possible embodiment, the above S301 can also be replaced by: when the vehicle is in the boost charging state, determining the current of the drive motor; and / or when the vehicle is in the boost charging state, determining the angular position of the drive motor. In this embodiment of the application, determining the charging torque of the drive motor is used as an example for explanation.

[0089] The above-mentioned steps of determining the charging torque of the drive motor, or determining the current and / or angular position of the drive motor, can be determined in real time, or can be determined periodically or non-periodically, and the embodiments of the present application do not impose specific restrictions on this.

[0090] Furthermore, the method may also include detecting the charging status of the vehicle, or detecting the charging intention of the vehicle. When the vehicle is detected to be in the boost charging state, step S301 is executed. When the vehicle is detected to be in the non-boost charging state, normal charging is performed for the vehicle, that is, the vehicle is charged directly using the charging voltage provided by the charging pile without reusing the drive motor for boosting.

[0091] S302: Determine an allowable charging current for the vehicle based on the charging torque, where the allowable charging current is a maximum allowable charging current.

[0092] The maximum allowable charging current can be considered from different perspectives, such as whether the vehicle is in a safe state, whether the noise vibration harshness (NVH) generated by charging is within an acceptable range, and the range of charging current that the vehicle can support in a safe state. In one example, the maximum allowable charging current includes: the maximum charging current allowed when the vehicle is in a safe state. In another example, the maximum allowable charging current includes: the maximum charging current allowed when the noise vibration harshness (NVH) of the vehicle is less than a preset threshold.

[0093] In one possible embodiment, determining the permissible charging current of the vehicle based on the charging torque may specifically include: querying the permissible charging current corresponding to the charging torque from first preset corresponding information based on the charging torque to determine the permissible charging current of the vehicle. The first preset corresponding information may be used to indicate the correspondence between different charging torques and different permissible charging currents, i.e., to indicate the permissible charging currents corresponding to different charging torques. Optionally, the permissible charging currents corresponding to different charging torques may be measured in advance and stored in the terminal device.

[0094] For example, the permitted charging currents corresponding to different charging torques may be as shown in Table 1. The different charging torques may include 100Nm, 150Nm, 200Nm, 250Nm and 300Nm, etc., and the corresponding permitted charging currents may be 100A, 95A, 85A, 75A and 50A, etc.

[0095] Table 1

[0096] It will be understood that the permitted charging currents corresponding to the different charging torques shown in Table 1 are merely exemplary and do not constitute a limitation to the embodiments of the present application.

[0097] S303: Charging the vehicle using a charging current that is no greater than the permitted charging current.

[0098] The charging current being no greater than the permitted charging current may mean that the charging current used to charge the vehicle may be less than or equal to the permitted charging current. Charging the vehicle using the charging current may specifically include using the charging current to charge a battery pack in the vehicle, which may also be referred to as a power battery or simply a battery.

[0099] In one possible embodiment, when charging the battery using the charging current, the charging current can be gradually increased, for example, starting from 0 and ensuring that the increased charging current does not exceed the permitted charging current, for example, until the charging current is equal to the permitted charging current. Alternatively, the vehicle can be charged using a charging current that gradually increases but does not exceed the permitted charging current, while maintaining a rate of increase of the charging current below a preset rate. By maintaining a rate of increase of the charging current below the preset rate, any vehicle jitter that may be caused by a rapid increase in the charging current can be reduced.

[0100] In this embodiment of the present application, when a vehicle is in a boost charging state, the charging torque of the vehicle's drive motor can be determined, and based on this charging torque, the vehicle's permitted charging current can be determined. This permitted charging current is the maximum allowable charging current, and the vehicle is then charged using a charging current no greater than this permitted charging current. This allows boost charging of the vehicle while maintaining the vehicle's charging speed while reducing the shock and vibration caused by boost charging, thereby improving the driving experience.

[0101] Furthermore, as shown in Figure 6(a), when the vehicle is on a surface with a certain slope (e.g., slope α), gravity will cause the vehicle to generate a downward slope component torque in a direction parallel to the slope, and the vehicle's braking device will generate a certain parking brake torque in a direction opposite to the slope component torque. Simultaneously, as shown in Figure 6(b), the slope component torque, the parking brake torque, and the aforementioned charging torque will reach a state of equilibrium, ensuring that the vehicle does not slide left or right.

[0102] Accordingly, in combination with FIG3 , as shown in FIG7 , when the vehicle is on a ground with a certain slope (for example, the slope is α), the above S302 may specifically include S3021 .

[0103] S3021: When the slope of the vehicle is less than or equal to a preset slope, determine the permitted charging current of the vehicle based on the charging torque and the parking brake torque of the vehicle.

[0104] Optionally, the slope on which the vehicle is located can be measured by one or more sensors installed in the vehicle or on-board equipment, or obtained by performing certain processing and calculation on the data measured by one or more sensors. This embodiment of the present application does not impose any specific restrictions on this.

[0105] The parking brake torque of the vehicle may be the parking brake torque actually generated by the parking brake device of the vehicle. Optionally, the parking brake device may be an EPB system, or may be another braking device other than the EPB system, such as a mechanical brake device, etc. This embodiment of the present application does not impose any specific limitation on this.

[0106] In addition, the preset slope can be pre-set in the terminal device. For example, the preset slope can be measured by a person skilled in the art based on actual conditions, and the measured preset slope can be configured in the terminal device for use. For example, the preset slope can be 10°.

[0107] In one possible embodiment, determining the permissible charging current of the vehicle based on the charging torque and the parking brake torque of the vehicle may specifically include: determining the permissible charging current corresponding to the charging torque and the parking brake torque from second preset corresponding information based on the charging torque and the parking brake torque of the vehicle. The second preset corresponding information is used to indicate the permissible charging current corresponding to different charging torques and different parking brake torques. Optionally, the second preset corresponding information may be measured in advance and stored in the terminal device.

[0108] For example, the permitted charging currents corresponding to different charging torques and different parking brake torques may be as shown in Table 2. The different charging torques may include 100 Nm, 200 Nm, and 300 Nm, etc., and the different parking brake torques may include 100 Nm, 200 Nm, and 300 Nm, etc. The corresponding permitted charging currents may be 100 A, 90 A, 85 A, 80 A, 70 A, and 50 A, etc.

[0109] Table 2

[0110] It will be understood that the permitted charging currents corresponding to the different charging torques and the different parking brake torques shown in Table 2 are merely exemplary and do not constitute a limitation to the embodiments of the present application.

[0111] Optionally, as shown in FIG7 , before S3021 , the method may further include a step of determining the parking brake torque of the vehicle, that is, the method may further include S304 .

[0112] S304: Determine the parking brake torque of the vehicle according to the slope of the vehicle and the charging torque.

[0113] Optionally, the parking brake torque of the vehicle is determined based on the slope of the vehicle and the charging torque, which may specifically include: determining the slope component torque based on the weight of the vehicle and the slope of the vehicle; and determining the parking brake torque of the vehicle based on the slope component torque and the charging torque.

[0114] The weight of the vehicle includes the weight of the vehicle body and may further include the weight of passengers and / or cargo on the vehicle. The weight of the vehicle may be stored in advance in the terminal device or measured by sensors on the vehicle, and this embodiment of the application does not impose any specific restrictions on this.

[0115] In a possible embodiment, determining the slope component torque based on the weight of the vehicle and the slope on which the vehicle is located may include: first, determining the slope component force generated by the vehicle in the opposite direction parallel to the slope based on the weight of the vehicle and the slope on which the vehicle is located, for example, determining the slope component force as the product of the weight of the vehicle and the slope on which the vehicle is located; and then, determining the slope component force torque based on the slope component force and the wheel radius of the vehicle, for example, determining the slope component force as the product of the slope component force and the wheel radius.

[0116] The wheel radius may be pre-configured or obtained by measurement. Specific factors affecting the wheel radius may include tire pressure, wheel hub size, and whether the vehicle has been modified, etc., and this embodiment of the application does not impose any specific restrictions on this.

[0117] In one possible embodiment, determining the vehicle's parking brake torque based on the grade component torque and the charging torque may include: when the drive motor's rotation direction is the same as the grade component torque, determining the vehicle's parking brake torque as the sum of the grade component torque and the wheel-end torque corresponding to the charging torque; and when the drive motor's rotation direction is opposite to the grade component torque, determining the vehicle's parking brake torque as the difference between the grade component torque and the wheel-end torque corresponding to the charging torque. For example, FIG8 shows a schematic diagram of the grade component torque, the charging torque, and the parking brake torque when the drive motor's rotation direction is the same as and opposite to the grade component torque.

[0118] The rotation direction of the drive motor can be determined by the angular position of the drive motor. For example, as shown in FIG. 4 , if the angular position of the drive motor is between 60° and 240°, the rotor of the drive motor can be considered to rotate in the forward direction; and if the angular position is between 0° and 60°, and between 240° and 360°, the rotor of the drive motor can be considered to rotate in the reverse direction.

[0119] Furthermore, when the vehicle is on a slope greater than the predetermined slope, the vehicle can be charged with limited power, i.e., the corresponding charging power is less than a predetermined power threshold. For example, the vehicle can be charged with a charging current less than a predetermined current threshold.

[0120] For ease of understanding, the technical solution provided by the embodiment of the present application is illustrated below with reference to FIG9 . As shown in FIG9 , the boost charging method may specifically include: S1. Detecting whether the vehicle is in a boost charging state; S2. If the vehicle is in a non-boost state (i.e., no), charging the vehicle normally; S3. If the vehicle is in a boost charging state (i.e., yes), determining whether the slope of the vehicle is greater than a preset slope; S4. If the slope of the vehicle is greater than the preset slope (i.e., yes), charging the vehicle with limited power; S5. If the slope of the vehicle is less than or equal to the preset slope (i.e., no), determining the permitted charging current of the vehicle; S6. Gradually increasing the charging current, the growth rate of the charging current may be less than the preset rate; S7. Determining whether the charging current is greater than or equal to the permitted charging current, if not, returning to S6; S8. If so, charging the vehicle using the permitted charging current as the limit.

[0121] In an embodiment of the present application, when the slope on which the vehicle is located is less than or equal to a preset slope, the permitted charging current of the vehicle can be determined based on the charging torque and the parking brake torque of the vehicle, thereby further improving the accuracy of the determined permitted charging current. In this way, when the vehicle is charged with a charging current not greater than the permitted charging current, the charging speed of the vehicle can be ensured while further reducing the impact and vibration caused by boost charging of the vehicle on a certain slope.

[0122] The above mainly introduces the solution provided by the embodiment of the present application from the perspective of the terminal device executing the method. It is understandable that, in order to realize the above functions, the above terminal device and the like include hardware structures and / or software modules corresponding to the execution of each function. Those skilled in the art should easily realize that, in combination with the units and algorithm steps of each example described in the embodiments disclosed herein, the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is executed in a hardware or computer software driven hardware manner depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0123] The embodiment of the present application can divide the functional modules of the terminal device according to the above method example. For example, each functional module can be divided according to each function, or two or more functions can be integrated into one processing module. The above integrated modules can be implemented in the form of hardware or in the form of software functional modules. It should be noted that the division of modules in the embodiment of the present application is schematic and is only a logical functional division. In actual implementation, there may be other division methods.

[0124] In the case of using an integrated unit, Figure 10 shows a possible structural diagram of the boost charging device involved in the embodiments of the present application. The device can be used as a terminal device or a chip applied to a terminal device. The device includes: a first processing unit 401, a second processing unit 402, and an output unit 403. Among them, the first processing unit 401 can be used to support the device to perform S301 in the above-mentioned method embodiment; the second processing unit 402 can be used to support the device to perform S302 in the above-mentioned method embodiment; and the output unit 403 can be used to support the device to perform S303 in the above-mentioned method embodiment. Furthermore, the second processing unit 402 can also be used to support the device to perform one or more steps of S3021 and S304 in the above-mentioned method embodiment.

[0125] Based on the hardware implementation, the first processing unit 401 and the second processing unit 402 in the embodiment of the present application can be the processors of the device, and the output unit 403 can be the communication interface of the device. The communication interface can also be called an interface circuit or a transceiver, and the transceiver can integrate a receiver and a transmitter.

[0126] As shown in Figure 11, it is another possible structural schematic diagram of the boost charging device involved in the above-mentioned embodiment provided in the embodiment of the present application. The device includes: a processor 411, and may also include a memory 412, a communication interface 413 and a bus 414. The processor 411, the memory 412 and the communication interface 413 are connected through the bus 414.

[0127] The processor 411 is used to control and manage the operation of the device. The processor 411 is used to execute one or more steps S301, S302, and S304 in the above-mentioned method embodiment, as well as other technical processes described herein. The communication interface 413 is used to support communication between the device and a vehicle, for example.

[0128] In the embodiment of the present application, the processor 411 can be a central processing unit, a general-purpose processor, a digital signal processor, an application-specific integrated circuit, a field programmable gate array or other programmable logic device, a transistor logic device, a hardware component or any combination thereof. It can implement or execute the various exemplary logic blocks, modules and circuits described in conjunction with the disclosure of this application. The processor can also be a combination that implements computing functions, such as a combination of one or more microprocessors, a combination of a digital signal processor and a microprocessor, and the like. The above-mentioned bus 414 can be a peripheral component interconnect (PCI) bus or an extended industry standard architecture (EISA) bus, etc. The bus can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, only one thick line is used in the above figure, but this does not mean that there is only one bus or one type of bus.

[0129] All relevant contents of each step involved in the above method embodiment can be referred to the functional description of the corresponding functional module and will not be repeated here. The various boost charging devices provided in the embodiments of the present application are used to perform the functions of the corresponding devices in the above embodiments, and thus can achieve the same effect as the above method.

[0130] The present application also provides a terminal device comprising a processor and a memory, wherein the memory stores instructions that, when executed on the processor, cause the terminal device to execute the boost charging method provided in the above method embodiment. Optionally, the terminal device may be a vehicle-mounted terminal.

[0131] On the other hand, an embodiment of the present application further provides a vehicle, which includes the boost charging device provided above.

[0132] The present application also provides a chip system that can be used in the terminal device described in the aforementioned embodiments. The chip system includes at least one processor and at least one interface circuit. The processor can be the processor in the aforementioned terminal device. The processor and the interface circuit can be interconnected via a line. The processor can receive and execute computer instructions from the memory of the aforementioned terminal device via the interface circuit. When the computer instructions are executed by the processor, the terminal device can execute the various steps performed by the mobile phone or tablet in the aforementioned embodiments. Of course, the chip system can also include other discrete components, which are not specifically limited in the present application.

[0133] In another aspect of the present application, a computer-readable storage medium is provided, in which a computer program or instruction is stored. When the computer program or instruction is executed, the boost charging method provided in the above method embodiment is executed.

[0134] In another aspect of the present application, a computer program product is provided, which includes: a computer program (also referred to as code, or instructions), which, when executed, enables a computer to execute the boost charging method provided in the above method embodiment.

[0135] Through the description of the above implementation methods, technical personnel in the relevant field can clearly understand that for the convenience and simplicity of description, only the division of the above-mentioned functional modules is used as an example. In actual applications, the above-mentioned functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above.

[0136] In the several embodiments provided in this application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are merely schematic. For example, the division of the modules or units is merely a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another device, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0137] The units described as separate components may or may not be physically separate, and the components shown as units may be one physical unit or multiple physical units, that is, they may be located in one place or distributed in multiple places. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0138] In addition, the functional units in the various embodiments of the present application may be integrated into a single processing unit, or each unit may exist physically separately, or two or more units may be integrated into a single unit. The aforementioned integrated units may be implemented in the form of hardware or software functional units.

[0139] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a readable storage medium. Based on this understanding, the part of the technical solution of the embodiment of the present application that contributes in essence or all or part of the technical solution can be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for enabling a device (which can be a single-chip microcomputer, chip, etc.) or a processor (processor) to execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0140] Finally, it should be noted that the above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any changes or substitutions within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A boost charging method, characterized in that: The method comprises: When the vehicle is in a boost charging state, determining a charging torque of a drive motor in the vehicle; Determining a permissible charging current for the vehicle according to the charging torque, wherein the permissible charging current is a maximum permissible charging current; The vehicle is charged using a charging current not greater than the permitted charging current.

2. The method according to claim 1, characterized in that The maximum allowed charging current includes: a maximum allowed charging current when the vehicle is in a safe state.

3. The method according to claim 1, characterized in that The maximum allowed charging current includes: the maximum allowed charging current when the noise vibration harshness (NVH) of the vehicle is less than a preset threshold.

4. The method according to any one of claims 1 to 3, characterized in that: The step of determining the permissible charging current of the vehicle according to the charging torque includes: When the slope of the vehicle is less than or equal to a preset slope, a permissible charging current of the vehicle is determined according to the charging torque and a parking brake torque of the vehicle.

5. The method according to claim 4, characterized in that The step of determining the permissible charging current of the vehicle according to the charging torque and the parking brake torque of the vehicle comprises: determining, according to the charging torque and the parking brake torque, a permissible charging current corresponding to the charging torque and the parking brake torque from preset corresponding information; The preset corresponding information is used to indicate the permitted charging current corresponding to different charging torques and different parking brake torques.

6. The method according to claim 4 or 5, characterized in that: The method further comprises: A parking brake torque of the vehicle is determined according to the slope of the vehicle and the charging torque.

7. The method according to claim 6, characterized in that The determining the parking brake torque of the vehicle according to the slope of the vehicle and the charging torque includes: Determining a slope component torque according to the weight of the vehicle and the slope on which the vehicle is located; A parking brake torque of the vehicle is determined according to the grade component torque and the charging torque.

8. The method according to any one of claims 1 to 7, characterized in that: The determining of the charging torque of the driving motor in the vehicle includes: The charging torque of the driving motor is determined according to the phase of the driving motor.

9. The method according to any one of claims 1 to 8, characterized in that: The step of charging the vehicle using a charging current no greater than the permitted charging current includes: The vehicle is charged using a charging current that gradually increases and is not greater than the permissible charging current, the charging current increasing at a rate less than a preset rate.

10. The method according to any one of claims 1 to 9, characterized in that: The drive motor supports two-phase boost charging.

11. A boost charging device, characterized in that: The device comprises: a first processing unit, configured to determine a charging torque of a driving motor in the vehicle when the vehicle is in a boost charging state; A second processing unit is used to determine a permissible charging current of the vehicle according to the charging torque, wherein the permissible charging current is a maximum permissible charging current; An output unit is used to charge the vehicle using a charging current not greater than the permitted charging current.

12. The device according to claim 11, characterized in that The maximum allowed charging current includes: a maximum allowed charging current when the vehicle is in a safe state.

13. The device according to claim 11, characterized in that The maximum allowed charging current includes: the maximum allowed charging current when the noise vibration harshness (NVH) of the vehicle is less than a preset threshold.

14. The device according to any one of claims 11 to 13, characterized in that: The second processing unit is further configured to: When the slope of the vehicle is less than or equal to a preset slope, a permissible charging current of the vehicle is determined according to the charging torque and a parking brake torque of the vehicle.

15. The device according to claim 14, characterized in that The second processing unit is further configured to: determining, according to the charging torque and the parking brake torque, a permissible charging current corresponding to the charging torque and the parking brake torque from preset corresponding information; The preset corresponding information is used to indicate the permitted charging current corresponding to different charging torques and different parking brake torques.

16. The device according to claim 14 or 15, characterized in that The second processing unit is further configured to: A parking brake torque of the vehicle is determined according to the slope of the vehicle and the charging torque.

17. The device according to claim 16, characterized in that The second processing unit is further configured to: Determining a slope component torque according to the weight of the vehicle and the slope on which the vehicle is located; A parking brake torque of the vehicle is determined according to the grade component torque and the charging torque.

18. The device according to any one of claims 11 to 17, characterized in that: The first processing unit is further configured to: The charging torque of the driving motor is determined according to the phase of the driving motor.

19. The device according to any one of claims 11 to 18, characterized in that: The output unit is also used for: The vehicle is charged using a charging current that gradually increases and is not greater than the permissible charging current, the charging current increasing at a rate less than a preset rate.

20. The device according to any one of claims 11 to 19, characterized in that The drive motor supports two-phase boost charging.

21. A terminal device, characterized in that: The terminal device includes a processor and a memory, the memory stores instructions, and the processor runs the instructions so that the terminal device executes the boost charging method as described in any one of claims 1-10.

22. A vehicle, characterized in that: The vehicle comprises the boost charging device according to any one of claims 11-20.

23. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores instructions, and when the instructions are executed by a device, the device executes the boost charging method according to any one of claims 1 to 10.

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